Tim Patterson created HIVE-8078:
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Summary: ORC Delta encoding corrupts data when delta overflows long
Key: HIVE-8078
URL: https://issues.apache.org/jira/browse/HIVE-8078
Project: Hive
Issue Type: Bug
Components: File Formats
Affects Versions: 0.13.1, 0.14.0
Reporter: Tim Patterson
Priority: Critical
There is an issue with the integer encoding that can cause corruption in
certain cases.
The following 3 longs cause this failure.
4513343538618202711
2911390882471569739
-9181829309989854913
I believe that even though the numbers are in decreasing order, the delta
between the last two numbers overflows causing a positive delta, in this case
the last digit ends up being corrupted (the delta is applied for the wrong sign
resulting in -3442132998776557225 instead of -9181829309989854913.
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